Anna Faris and Chris Evans are set to take a trip down memory lane in New Regency’s R-rated laffer “What’s Your Number?”

Director Mark Mylod will lens in May. Regency partner 20th Century Fox will distribute. Mylod’s credits include HBO series “Entourage.”

“Number” revolves around a young woman who, with the aid of her womanizing next door neighbor, decides to re-visit all her ex-boyfriends in the hopes of finding the man of her dreams.

Beau Flynn and Tripp Vinson are producing. Their previous credits include “Journey to the Center of the Earth” and “The Guardian.” They’re in post on “Red Dawn.”

“What’s Your Number?” is based on Karyn Bosnak’s tome “20 Times a Lady.” Bosnak originally adapted the book for the bigscreen; her script was rewritten by Jennifer Crittenden and Gabrielle Allan.

Before landing at Regency, the project was at New Line, then Sony.

Faris, who will exec produce “What’s Your Number?”, has two other studio projects, “Gold Diggers” at Paramount, also starring Kate Hudson, and “TMI” at Universal, in which Faris will star opposite Ryan Reynolds. She also has “Yogi Bear” in the works.

Faris’ R-rated comedy “The House Bunny” was a sleeper hit for Sony and Relativity, grossing $70.4 million at the worldwide box office in late 2008.

Evans, who played Johnny Storm in Fox’s “Fantastic Four” franchise, is in theaters next month with Warner Bros.’ actioner “The Losers.”